I'm sure I've seen them in some of my books, but I couldn't find exactly what I was looking for for an example. The closest I've found was similar to below:
Front Matter(followed by a down arrow)
Praise for...
Also by
Title Page
Copyright
and then the normal TOC continues.
If you tap the down arrow, it changes to a right arrow and all the subsections are hidden. (I might have the direction of the arrows reversed, but...)
Looking at the code in Sigil, I couldn't see anything that would cause this behavior, and a search for "Front Matter" had no results.
I have a couple enormous books where I would like to break the ebook down into the same sections as the actual books, i.e.
Section One
Chapter 1
Chapter 2
Chapter 3
...
Section Two
Chapter 16
Chapter 17
Chapter 18
...
Section Three, etc.
Is this possible, and if so, how do you do it?
Thanks for your help.